Regular aerobic activity such as walking, bicycling or swimming can help you live longer and healthier. Need motivation? See how aerobic exercise affects your heart, lungs and blood flow. Then get moving and start reaping the rewards.

Boost your mood Aerobic exercise may ease the gloominess of depression, reduce the tension associated with anxiety and promote relaxation.

Stay active and independent as you age Aerobic exercise keeps your muscles strong, which can help you maintain mobility as you get older.

Aerobic exercise also keeps your mind sharp. At least 30 minutes of aerobic exercise three days a week appears to reduce cognitive decline in older adults.

Live longer Studies show that people who participate in regular aerobic exercise live longer than those who don't exercise regularly.

Take the first step

Ready to get more active? Great. Just remember to start with small steps. If you've been inactive for a long time or if you have a chronic health condition, get your doctor's OK before you start.

When you're ready to begin exercising, start slowly. You might walk five minutes in the morning and five minutes in the evening.

The next day, add a few minutes to each walking session. Pick up the pace a bit, too. Soon, you could be walking briskly for at least 30 minutes a day and reaping all the benefits of regular aerobic activity.

If you have a condition that limits your ability to participate in aerobic activities, ask your doctor about alternatives. If you have arthritis, for example, aquatic exercises may give you the benefits of aerobic activity without stressing your joints.

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